Fixed potential crash if LLFlatListView is created as a dummy widget.
Fixed potential crash if LLFlatListView is created as a dummy widget.

gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm